 .chat-room {
     width: 100%;
     height: 100%;
     display: flex;
     flex-direction: column;
 }

 .chat-content {
     width: 100%;
     flex: 1;
     background: #eee;
     overflow: auto;
 }

 .chat-op {
     width: 100%;
     height: 40px;
     line-height: 40px;
     position: fixed;
     bottom: 0;
     left: 0;
 }

 .me-item {
     text-align: right;
 }